<template>
  <div class="father">
    <h3>父组件</h3>
    <h4>a：{{ a }}</h4>
    <h4>b：{{ b }}</h4>
    <h4>c：{{ c }}</h4>
    <h4>d：{{ d }}</h4>
    <Child
      :a="a"
      :b="b"
      :c="c"
      :d="d"
      v-bind="{ x: 100, y: 200 }"
      :updateA="updateA"
    />
  </div>
</template>

<script setup lang="ts" name="Father">
import Child from './Child.vue'
import { ref } from 'vue'

let a = ref(1)
let b = ref(2)
let c = ref(3)
let d = ref(4)

function updateA(value: number) {
  a.value += value
}
</script>

<style scoped>
.father {
  background-color: rgb(165, 164, 164);
  padding: 20px;
  border-radius: 10px;
}
</style>
